Moved by Masses? Shared Moods and Their Impact on Immoral Behavior

It is often suggested that people in large groups behave and act differently than when they are alone. More precisely, it is an often-repeated claim that they tend to act in a morally problematic or plainly reprehensible way. Still, a fully satisfying explanation has not yet been given for why this is the case. In this paper, I suggest that the phenomenon of shared moods may play a crucial role here. In order to explicate and support this thesis, first, I will point out the problem in a more detailed way while also considering findings in social psychology. Second, I will give a sketch of how shared moods should be (philosophically) conceptualized as a special affective phenomenon by refering to the discussion of collective intentionality and emotions. Thirdly and finally, I will address concretely the question of what might make shared moods morally precarious by distinguishing also between collective and joint moods that both can change a person’s self-understanding as an (moral) actor.